This book systematically constructs a complete knowledge system for the design of aging-friendly services. It begins with an analysis of global aging trends, examining the challenges and opportunities faced today, clarifying the necessity and strategic significance of designing for the elderly, and providing detailed interpretations of relevant policies, regulations, and data security requirements. At the theoretical level, the book delves into the physiological and psychological characteristics of the elderly population, including physical function decline, cognitive ability changes, and psychological needs characteristics, providing a scientific basis for design practice. It also emphasizes key principles such as universal design and barrier-free design, highlighting the humanistic care and ethical considerations in design. In terms of practical application, the book offers systematic methods for user needs research, as well as specific implementation plans for interface design and interaction optimization. It pays special attention to key elements such as visual presentation and operational procedures, effectively enhancing the user experience for elderly users. Finally, the book prospectively explores the application prospects of intelligent technology in aging-friendly services, including innovative solutions such as the Internet of Things and artificial intelligence, pointing out the direction for the intelligent development of aging-friendly services. The book combines theory with practice, providing comprehensive guidance for building a humanized and intelligent aging-friendly service system.